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首页> 外文期刊>Journal of power sources >Electrochemical characteristics of the reduced graphene oxide/carbon nanotube/polypyrrole composites for aqueous asymmetric supercapacitors
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Electrochemical characteristics of the reduced graphene oxide/carbon nanotube/polypyrrole composites for aqueous asymmetric supercapacitors

机译:用于水性不对称超级电容器的还原氧化石墨烯/碳纳米管/聚吡咯复合材料的电化学特性

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摘要

Polypyrrole (PPy) has been polymerized onto reduced graphene oxide/carbon nanotube (rGO/CNT) to form an rGO/CNT/PPy composite using the chemical oxidation method. The electrochemical characteristics of the above composite in various aqueous electrolytes are systematically compared for the asymmetric supercapacitor application. The electrochemical characteristics of rGO/CNT/PPy in the electrolytes containing K~+ show improved reversibility and higher stability. Introducing XC-72 in preparing the electrode has been found to enhance the specific capacitance and the cycle stability of rGO/ CNT/PPy. The charge storage stability of rGO/CNT/PPy + XC-72 in various potential windows has been evaluated through the potential bias stress test. An asymmetric supercapacitor (ASC) with a positive electrode of Mn_3O_4 and a negative electrode of rGO/CNT/PPy + XC-72 is successfully demonstrated, which shows specific energy and power of 14. Wh kg~(-1) and 6.62 kW kg~(-1) with a cell voltage of 1.6 V. This ASC with a cell voltage of 1.6 V shows excellent charge-discharge cycle stability and ideal capacitive behavior in NaNO_3 even after the application of 3250 charge-discharge cycles.
机译:聚吡咯(PPy)已通过化学氧化方法聚合到还原的氧化石墨烯/碳纳米管(rGO / CNT)上,形成了rGO / CNT / PPy复合材料。对于不对称超级电容器应用,系统地比较了上述复合材料在各种水性电解质中的电化学特性。 rGO / CNT / PPy在含K〜+的电解质中的电化学特性显示出改善的可逆性和更高的稳定性。已经发现在制备电极中引入XC-72可提高rGO / CNT / PPy的比电容和循环稳定性。通过电位偏置应力测试评估了rGO / CNT / PPy + XC-72在各种电位窗口中的电荷存储稳定性。成功地证明了具有Mn_3O_4正电极和rGO / CNT / PPy + XC-72负电极的不对称超级电容器(ASC),其比能和功率分别为14. Wh kg〜(-1)和6.62 kW kg电池电压为1.6 V的〜(-1)。即使在施加3250次充放电循环后,该具有1.6 V电池电压的ASC在NaNO_3中仍具有出色的充放电循环稳定性和理想的电容性能。

著录项

  • 来源
    《Journal of power sources》 |2014年第25期|970-978|共9页
  • 作者单位

    Laboratory of Electrochemistry & Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan;

    Laboratory of Electrochemistry & Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan;

    Laboratory of Electrochemistry & Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan;

    Laboratory of Electrochemistry & Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan;

    Laboratory of Electrochemistry & Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan;

    Laboratory of Electrochemistry & Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan, Department of Chemical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsin-Chu 30013, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polypyrrole; Reduced graphene oxide/carbon nanotube; Carbon black; Aqueous electrolyte; Asymmetric supercapacitor;

    机译:聚吡咯;还原的氧化石墨烯/碳纳米管;碳黑;电解质水溶液;不对称超级电容器;

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